| 초록 |
The lignocellulosic biomass is considered to be viable feedstock for production of fuels and chemicals because it can be abundant source of fermentable sugar production. Corn stover was fractionated using two-stage percolation process for consecutive recovery of nonstructural sugar and xylooligomer. In the 1st stage, hot-water at moderate temperature (60-90°C) was used for effective recovery of extractive including nonstructural sugar (sucrose), which was followed by the fractionation using either hot-water or CaCl2 at higher temperature (~210°C). In the 1st stage, temperature was gradually increased with various slopes and solubilized components were recovered. Then, hemicellulose recovered in a form of xylooligomer was recovered in the 2nd stage. The optimum conditions were established by the response surface methodology based on the central composite design method. |
